Multifilament polytrimethylene terephthalate yarn formed of single filaments, preliminary twist textured polytrimethylene terephthalate yarn, stretched polystrimethylene terephthalate yarn formed from single filaments, and processes to produce the same

摘要

"MULTIFILAMENTAR YARN OF POLYTHRIMETHYLENE TEREFTALATE FORMED OF SINGLE FILAMENTS, YARN OF PRELIMINARY TORSION TEXTURIZED POLYTHRIMETHYLENE TYPE, TYPE OF TYPE OF TYPE OF POLYTHRIMETHYLENE THERAPY, MULTI-STYLED MATERIALS, PROCESSED PRODUCTS. The present invention provides a yarn suitable for stretch-type garments, the yarn of which is a multifilament yarn of polytrimethylene terephthalate having an intrinsic viscosity in the range of 0.7 to 1.1 dl / g, a single filament size in a range of 3.3 to 8.9 dtex, an elongation at break in a range of 36 to 60% and the fluctuation value of yarn size (U%) is 1.2% or less and a textured twist yarn preliminary view. The multifilament yarn is produced under conditions where a distance between the adjacent spinning holes is 5 mm or more, the spinning temperature is in the range of 255 to 275 198 C, the surface temperature of the spinneret is 255 198 C or greater, and a product of the linear polymer melt discharge velocity V and the intrinsic viscosity [sym] is in a range of 5 to 12 (m / min) (dl / g). Because the contamination on the periphery of the spinning hole generated during melt spinning is minimized according to this production process, the period between cleaning can be extended, which is extremely advantageous in the industrial sense.